E520.01A61AC ELMOS Semiconductor, E520.01A61AC Datasheet - Page 22

• Manufacturer Part Number: E520.01A61AC
• Description: Motor / Motion / Ignition Controllers & Drivers 12x low side driver with Stall detection
• Manufacturer: ELMOS Semiconductor
• Type: Unipolar Stepper Motor Driverr

Specifications of E520.01A61AC

• Rohs: yes
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 3.3 V, 5 V
• Supply Current: 5 mA
• Operating Temperature: - 40 C to + 125 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Number Of Outputs: 12
• Output Current: 300 mA
• Output Voltage: 3 V to 25 V
• Power Dissipation: 2.8 W

6.7 PWM Output Driving
PWM Source Assignment
Each driver may be controlled only by one out of 3 PWM sources PWMA, PWMB and PWMC. The assignment be-
tween the channels and the PWM sources is fixed:
Table 5. PWM Channel Assignment
The pin combination was optimized to drive Three-colour LED applications.
At E520.03 and E520.08 out 8,9,10,11 are not available.
For automotive HVAC systems out 0-7 can be used to drive 2 stepper motors. Out 8,9,10 may be used to drive a
3-color LED for HVAC display illumination.
6.8 Linear PWM Mode
Each of the channels may independently be switched
into Linear PWM mode. For this mode three internally
clocked PWM sources with the same frequency but in-
dependently adjustable duty cycles are implemented.
Recommended configurations for linear pwm mode
are:
• PWEx=1
• LOG=0
6.9 Smart Relay Driving with V
The V
consumption of relays, by driving them with a PWM
signal.
There is no need for the external controller to measure
the supply voltage and calculate and transfer the opti-
mal PWM duty-cycle to the IC.
This document contains information on a pre-production product. ELMOS Semiconductor AG reserves the right to change specifications and information herein without notice.
PWMA
0
3
6
9
12 / 8 ChANNeL LOw SIDe DRIveR wITh STALL DeTeCTION
PRODUCTION DATA - JUL 24, 2012
ELMOS Semiconductor AG
into Constant PWM mode PWMAy in SPI register
0110
to adjust the duty cycles of PWM sources A, B and C
mode
BATsense
b
, PWMBx and PWMCx in SPI register 0111
b
b
in SPI register 0110
adapted PWM mode reduces the power
in SPI register 0011
4
7
10
PWMB
1
PWMC
2
5
8
11
b
to select Linear PWM
b
to switch the driver
BATsense
adapted PWM
Data Sheet
22/29
b
In Constant PWM mode 3 PWM sources of the same
frequency but several duty cycles are adjustable. These
3 sources A, B and C are independently of each other
and may each be adjusted with a resolution of 5 bits.
• PWMX[4:0]=00000
• PWMX[4:0]=11111
Please note that the effective duty cycle visible on the
driver output is additionally affected by propagation
delay and slew rates of the power drivers, which guar-
antee EMC compliant switching behaviour. Duty cycle
values stated in this chapter only refer to the digital
control signals.
The IC itself does this job by measuring the VBAT_
SENSE pin.
At low supply voltages the IC drives the relays with
100% duty cycle. At higher-supply voltages the IC auto-
matically limits the effective relay voltage to typ. 11V.
Adjustment of Duty Cycle
(permanently on)
b
b
belongs to 100% duty cycle
belongs to 3% duty cycle
e520.01/02/03/08
QM-No.: 25DS0054E.02